Bridge-wall construction for furnaces



Jan. 15, 1929. 1,699,018

J. H. PRlvoTT ET AL.

BRIDGE WALL CONSTRUCTION FOR FURNACES Filed Oct. '7, 1927 s 52256? Mza/Ms W INVENTORS WTNESS: ATTORNEY Patented Jan. 15, 1929.

UNITED S'iATES PATENT OFFICE.

JOHN H. PRIVOTT AND BILL C. WILLIAMS, OF NORFOLK, VIRGINIA.

BRIDGE-WALL CONSTRUCTION FOR FURNACES.

Application led October 7', 1927.

This invention relates to improvements in furnaces, the general objectof the invention being to provide a. bridge wall composed of curved barsremovably supported on parts of the wall7 with moans whereby the can beeasily removed when damaged and replaced by new ones7 without drawingthe tire.

This invention also con Es in certain other features of construction andin the combination and arrangement of the several parts, to behereinafter fully described, illustrated in the accompanying drawingsand specifically pointed out in the appended claim.

In describing our invention in detail, reference will be had to theaccompanying drawings wherein like characters denote like orcorresponding parts throughout the several views, and in which Figure lis a vertical sectional view through a portion of the furnace.

Figure 2 is a horizontal sectional view.

Figure 3 is a sectional View through one of the bars.

Figure 4 is a view of the rod used to remove and replace the bars.

Figure 5 is a view of the single bar.

Figure G is a perspective view of one of the double bars.

I? ig. 7 is a view of the supporting member for the lower ends of thegrate bars which forms the bridge wall table.

In these views, l indicates the furnace shell and 2 indicates thesupporting member for the rear ends of the grate bars 3, this memberbeing the table of the bridge wall and it has two properly spaced holes2 therein which are located beneath the bridge grates. A. verticallyarranged member el, connected with the rear part of member 2, formsanother part of the bridge wall and a plurality of curved bars 5 formthe rest of t-he wall. These bars have their lower ends resting upon thefront portion of member 2 and their rear ends are provided with thewedge shaped notches 6 for receiving the tapered upper edge of themember 4. Thus the bars are firmly supported on the members 2 and l andthese bars can be removed whenever necessary or desirable by means of a.long rod 4' which is adapted to be passed through the front of thefurnace and have its bent tapered end 8 inserted in a tapered hole 9formed in each grate bar. The

Serial No. 224,653.

tapered end, entering the tapered hole, will set up a wedging action sothat the bar will be connected with the rod and thus the bar can beremoved from the furnace by withdrawing the rod. The bars can be placedin the furnace in the same manner.

As shown, the bars 5 are formed double, though the center bar 5 is shownsingle. Each har is formed with the spacing projections 10 to providefor the passage of air and ashes.

From the foregoing it will be seen that we have formed a bridge wall ofhorizontally and vertically arranged supporting members and a pluralityof curved bars which may be removed when damaged and replaced by newones, and this without drawing the lire.

The table 2, i h its openings 2, not only acts as a support for the bars5, but it also permits air to pass from the ash pit through the spacesbetween the bars and ashes falling through the spaces between the barswill drop tlirongh the spaces 2 in the table into the ash pit.

It is thought from the foregoing description that the advantages andnovel features of our invention will be readily apparent.

It is to be understood that we may make changes in the construction andin the combination and arrangement of the several parts, provided thatsuch changes fall within the scope of the appended claim.

Vhat we claim is In a furnace, a. bridge wall composed of a horizontalpart having openings therein and a vertical rear part having its upperedOe beveled and arcuate shaped bars having their lower ends resting onthe horizont-al part and their upper ends having wedge shaped notches intheir lower faces receiving the beveled upper edge of the vertical part,said horizontal and vertical parts and the bars forming a quadrantshaped space and each bar having a tapered opening at its cenif terwiereby a tool can be inserted in said opening to lift the barvertically to free its notched part from the vertical member and thenremove the bar from the furnace without y interfering with the fuel inthe furnace.

In testimony whereof we aiiiX our signatures.

JOHN H. PRIVOTT. BILL C. VVILLIAMS.

